I do plan on having supports similar to Starman's cannons. With the size of my planned chamber and barrel I will definitely need it.

Hello all,

I'm new to posting, but I've been lurking in the forums for years. I've wanted to make a propane fueled tennis ball cannon for years now. I've owned a spray n pray ( 3 x 18 chamber 1.5 x 60 barrel) for nearly 10 years.

I've looked at burnt latke, forums here, pretty much everything ...